what are the benefits of using a shunt regulated psu in a preamplifier, over a series regulated one? Are there any improvements in sound?

my psu for preamp is based on lm317/lm337 regulators and im thinking of building the A-class Preamp PSU posted here by APEX.

I'd say that the main benefit is that a shunt regulator can isolate A.C. load current to a localized loop area. In other words, it can minimize the A.C. current interaction between various circuit blocks which might stem from any shared primary power supply connections. This also applies to the A.C. current demanded from the power supply elements prior to the shunt regulator, making the ecurrent demand D.C.

I'd say that the main benefit is that a shunt regulator can isolate A.C. load current to a localized loop area. In other words, it can minimize the A.C. current interaction between various circuit blocks which might stem from any shared primary power supply connections. This also applies to the A.C. current demanded from the power supply elements prior to the shunt regulator, making the ecurrent demand D.C.

Mr Mile,i want a 30V single rail PSU for a preamp so i made a new board based on your class A 2x24V PSU schematic but using the upper positive half.i also added a fuse on the board. do any part values have to be changed for 30V output? on a earlier post you stated that BF245 could be substituted with BF244, 2N3819, 2N3823. does it apply also to this class A PSU?